Anyway, my first attempt seems to have gone pretty badly; I've ended up with 8 out of 16 WUs marked as 'computation error'. I'm pretty sure it's the result of overclocking - my CPU was running at 3.75 (stock is 3.2), and my primary GPU running about 15% over as well. Fine for games, but games don't normally run at 100% load except in short bursts.

I've disabled the overclock and resumed the client, so far I've not run into any additional problems, and as the failed WU's all failed within 20 seconds I think this has resolved it.

However, I can't see any way to make a fresh attempt at the WUs that originally failed - is it possible to restart work on those units or should I just write them off?

BOINC has a built in check for things like this: Once work is returned as computation error or other error, it will be sent to other computers, to corroborate if your claim of 'problem' was correct. If not, the other computers will make sure the science gets done correctly, while if they can't do it either, it's probably something in the tasks that's at fault.

So don't worry about it. Jord

Ancient Astronaut Theorists suggest that in many ways, you can be considered an alien conspiracy!